8-Bit Gpio Function - Boser HS-2621 Manual

3.21 8-bit GPIO Function

The HS-2621 offers one 8-bit input/output port by parallel port.
JP4: 8-bit GPIO
PIN Description PIN Description
1 VCC
3 GPIO0
5 GPIO1
7 GPIO2
9 GPIO3
W83627EHG
Digital I/O Assembly sample code
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Extended function mode
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MOV DX,2EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
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Configure logical device 7
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MOV DX,2EH
MOV AL,07H
OUT DX,AL
MOV DX,2FH
MOV AL,07H
OUT DX,AL
MOV DX,2EH
MOV AL,30H ; Enable GPIO1
OUT DX,AL
MOV DX,2FH
MOV AL,01H
OUT DX,AL
2 GND
4 GPIO4
6 GPIO5
8 GPIO6
10 GPIO7
9 1
10 2
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